Unknown column 'mnum' in 'order clause'<br>select id,classid,ttid,onclick,plnum,totaldown,newspath,filename,userid,username,firsttitle,isgood,ispic,istop,isqf,ismember,isurl,truetime,lastdotime,havehtml,groupid,userfen,titlefont,titleurl,stb,fstb,restb,keyboard,title,chlei,smalltext,titlepic,newstime,moshi,xitong,yuyan,downfen,filesize from ***_ecms_ruanjian where classid in (959,960,961,962,963,964,965,966,967,968,969,970,971,972,973,974,975,976,977,978,979,980,981,982) order by mnum desc,downfen desc,totaldown desc limit 0,25